AUSLANDER, M.; REITEN, I.; SMALO, S. O. Galois actions on rings and finite Galois coverings. MATHEMATICA SCANDINAVICA, [S. l.], v. 65, p. 5–32, 1989. DOI: 10.7146/math.scand.a-12261. Disponível em: https://www.mscand.dk/article/view/12261. Acesso em: 2 may. 2024.